Xyloglucan endotransglucosylase/hydrolases (XTHs) are enzymes that play a crucial role in the modification and restructuring of Plant Cell Walls by Cleaving and rejoining xyloglucan chains, which are essential for Cell wall flexibility and growth. They are involved in processes like Cell Expansion, Fruit Ripening, and Response to environmental stresses, making them vital for Plant Development and adaptation.